-
The ion charge order of surfactants
I was told that anionic surfactants may have their order of addition by their anionic charge for a shampoo. what does that mean and how do I determine the charge and the addition rank?
-
4 Replies
-
@Henry that dictum applies whenever you are building a conditioning shampoo with cationic materials or when employing an acrylate copolymer thickener. Otherwise you can add in any order you like, there is not much difference in zeta potential so much as there is in activity levels.
-
@chemicalmatt -thank you… I am still confused. is there a rule of thumb about order of addition for shampoos. and with acrylate copolymer.
-
That will be formula dependent @Henry. If no cationics are present,then add your anionics (e.g. SLES, Na sarcosinates, etc.) first, then nonionics, amphoterics, builders. When using multiple anionics, add the least soluble one first (i.e. sarcosinates).
-
If I had cationics…. with anionic surfactants….I should add those last? Thank you again.
Log in to reply.
